What Is the Function of the Positive Crankcase Ventilation System and PCV Valve and How Should It Be Tested and Maintained on Buick Regal?

Engineering for both Centurys and Regals include positive crank-case ventilation (PCV) system to control emissions of blow-by vapours from the crank-case. When the engine is running, there are some gases which escape from the combustion chamber to the crank case through piston ring. These pressurised gases can be emitted to the atmosphere, they may cause contaminations in the engine oil and formation of sludge. The PCV system recirculates these gases back into the combustion chamber by drawing clean filtered air through the air filter into the crank case where it collects combustion gases then passes through oil separator and PCV valve and into the induction system. The PCV valve is rather important as it controls the gas flow; it restricts the flow of the gases at low rpm but unlocks the path further at higher rpm. The problems arise when the valve is blocked and the gas forces its way through weak seals where it leads to formation of oil leaks and sludges. The PCV valve needs vacuum at idle and the hoses and connections of the system need to be inspected and replaced. The valve should be taken out and shaken, and if it does not produce a rattling sound, there is probability it is blocked and has to be changed. When replacing the PCV valve, certain type should be used to prevent some driveability problems. During installation or reassembly be sure that the valve has been put in the correct place and securely clamped down, and check related parts for signs of wear before reinstalling the air cleaner and connections.

Genuine Buick Regal PCV Valve

Position Crank Ventilation Valve

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20 PCV Valves found

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Buick Regal Valve,Pcv
Part Number: 12663027
$28.12 MSRP: $53.06
You Save: $24.94 (47%)
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON, CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Valve,Pcv
Part Number: 6487936
$1.20 MSRP: $8.38
You Save: $7.18 (86%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1983 Buick Regal | 2 DOOR, 4 DOOR, STATION WAGON | 6 Cyl 3.8L
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Buick Regal Valve Assembly, Pcv
Part Number: 12655399
$19.50 MSRP: $36.80
You Save: $17.30 (48%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Replaces: 12637663
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2015 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Valve Assembly, Pcv
Part Number: 12655400
$28.27 MSRP: $53.34
You Save: $25.07 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Replaces: 12637664
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2015 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Valve Assembly, Pcv
Part Number: 12655189
$21.67 MSRP: $40.88
You Save: $19.21 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: PCV Valve
- Replaces: 12650732
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON, CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Breather Assembly, Air Cleaner & Silencer
Part Number: 6484966
$3.58 MSRP: $6.50
You Save: $2.92 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: BREATHER, Air Cleaner Intake; Breather, Breather Element
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1984 Buick Regal | 2 DOOR, 4 DOOR, STATION WAGON | 6 Cyl 3.8L, 6 Cyl 4.1L
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Buick Regal Valve Assembly, Pcv
Part Number: 12714149
$18.43 MSRP: $34.78
You Save: $16.35 (48%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: PCV Valve
- Replaces: 12673554, 12666420
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 Buick Regal | 1SX 4 DOOR HATCHBACK | 6 Cyl 3.6L
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Buick Regal Valve Assembly, Pcv
Part Number: 12665167
$12.48 MSRP: $23.54
You Save: $11.06 (47%)
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON, CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Valve Assembly, Pcv
Part Number: 12665166
$14.86 MSRP: $28.04
You Save: $13.18 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON, CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal VALVE KIT,PCV
Part Number: 19431592
$24.01 MSRP: $45.30
You Save: $21.29 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: PCV Valve
- Replaces: 89017274, 17113515, 89017684
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2004 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GRAN SPORT 4 DOOR, GS, LIMITED, LIMITED 4 DOOR, LS, REGAL | 6 Cyl 3.8L
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Buick Regal Valve Assembly, Pcv
Part Number: 55596783
$13.84 MSRP: $22.91
You Save: $9.07 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON | 4 Cyl 2.0L
View related parts
Buick Regal Valve Assembly, Pcv
Part Number: 12589440
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2013 Buick Regal | CXL TURBO 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Valve,Crankcase Vent
Part Number: 6487534
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1987 Buick Regal | 2 DOOR, 4 DOOR, REGAL, STATION WAGON | 6 Cyl 3.8L, 6 Cyl 4.1L
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Buick Regal Valve,Pcv
Part Number: 25095468
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1986-1987 Buick Regal | REGAL | 6 Cyl 3.8L
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Buick Regal Valve,Pcv
Part Number: 25043843
Product Specifications
- Other Name: VALVE, Engine Crankcase; Crankcase, PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-2004 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GL, GLX, GRAN SPORT 2 DOOR, GRAN SPORT 4 DOOR, GS, LIMITED, LIMITED 2 DOOR, LIMITED 4 DOOR, LS, REGAL | 6 Cyl 2.8L, 6 Cyl 3.1L, 6 Cyl 3.8L
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Buick Regal Breather Pkg. (Fb73)
Part Number: 8996724
Product Specifications
- Other Name: BREATHER, Air Cleaner Intake; Breather Element
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1987 Buick Regal | 2 DOOR, 4 DOOR, REGAL, STATION WAGON | 6 Cyl 3.8L
View related parts
Buick Regal Valve,Pcv
Part Number: 8997683
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1987 Buick Regal | 2 DOOR, 4 DOOR, REGAL, STATION WAGON | 8 Cyl 5.0L
View related parts
Buick Regal Valve,Crankcase Vent
Part Number: 25041551
Product Specifications
- Other Name: REGULATOR, Engine Crankcase
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1984 Buick Regal | 2 DOOR, 4 DOOR, STATION WAGON | 6 Cyl 4.3L Diesel
View related parts
Buick Regal Valve Kit,Crankcase Vent
Part Number: 17113046
Product Specifications
- Other Name: VALVE KIT, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-1995 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GRAN SPORT 2 DOOR, GRAN SPORT 4 DOOR, LIMITED 2 DOOR, LIMITED 4 DOOR | 6 Cyl 3.8L
View related parts
Buick Regal Valve,Crankcase Vent
Part Number: 25041678
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1983 Buick Regal | 2 DOOR, 4 DOOR, STATION WAGON | 8 Cyl 5.7L Diesel

Buick Regal PCV Valve

Engine control and emissions in Buick Regal vehicles are made possible by a PCV Valve that also boosts the performance of the automobile. Since the PCV Valve channels gases from the crankcase back to the combustion chambers where they are burnt, it helps in preventing environmental pollution and, formation of oil sludge. Being a function of intake manifold vacuum conditions, the PCV Valve shuts down the gas flow at idle position and opens at the time when loads are being imposed on the crankcase without interference with the engine operations. Also, the PCV Valve performs the function of a flame arrester and may help to increase the power of the engine through compression. Maintenance and inspections are suggested from time to time in order to prevent cases of having to spend a lot of cash just to repair the car and to make sure that the car is performing as it is expected to.

Each OEM Buick Regal PCV Valve we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Buick Regal PCV Valve Parts Questions & Experts Answers

Breather Assembly, Air Cleaner & Silencer
6484966
Q: What Is the Function of the Positive Crankcase Ventilation System and PCV Valve and How Should It Be Tested and Maintained on Buick Regal?
A: Engineering for both Centurys and Regals include positive crank-case ventilation (PCV) system to control emissions of blow-by vapours from the crank-case. When the engine is running, there are some gases which escape from the combustion chamber to the crank case through piston ring. These pressurised gases can be emitted to the atmosphere, they may cause contaminations in the engine oil and formation of sludge. The PCV system recirculates these gases back into the combustion chamber by drawing clean filtered air through the air filter into the crank case where it collects combustion gases then passes through oil separator and PCV valve and into the induction system. The PCV valve is rather important as it controls the gas flow; it restricts the flow of the gases at low rpm but unlocks the path further at higher rpm. The problems arise when the valve is blocked and the gas forces its way through weak seals where it leads to formation of oil leaks and sludges. The PCV valve needs vacuum at idle and the hoses and connections of the system need to be inspected and replaced. The valve should be taken out and shaken, and if it does not produce a rattling sound, there is probability it is blocked and has to be changed. When replacing the PCV valve, certain type should be used to prevent some driveability problems. During installation or reassembly be sure that the valve has been put in the correct place and securely clamped down, and check related parts for signs of wear before reinstalling the air cleaner and connections.